Makefile hierarchy: CFLAGS override-ability actually works now The original version was broken in that CFLAGS=${CFLAGS} passing was done without quotes, which breaks as soon as there is a space in the user-set CFLAGS. Changing it to CFLAGS="${CFLAGS}" makes it work as originally intended.

#include <stdarg.h>

extern void putchar();

int
vprintf(fmt, ap)
	char *fmt;
	va_list ap;
{
	return(_doprnt(fmt, ap, &putchar));
}